#5181DB#5181DB

#5181DB is a mid, vivid blue. Relative luminance 0.226; OKLCH L 61.3% C 0.147 H 261.8°. Best body text is #000000 at 5.51:1 contrast (WCAG AA passes).

Color values

HEX	#5181DB
RGB	rgb(81, 129, 219)
HSL	hsl(219, 66%, 59%)
HSV	hsv(219, 63%, 86%)
CMYK	cmyk(63%, 41.1%, 0%, 14.1%)
CIE-LAB	lab(54.62, 11.75, -50.93)
CIE-LCH	lch(54.62, 52.27, 282.99°)
OKLab	oklab(61.25% -0.0208 -0.1451)
OKLCH	oklch(61.25% 0.147 261.8)
XYZ	xyz(24.0253, 22.5621, 70.0929)
Luminance	0.2256 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181DB #DBAB51

analogous

#51C6DB #5181DB #6651DB

triadic

#5181DB #DB5181 #81DB51

tetradic

#5181DB #DB51C6 #DBAB51 #51DB66

square

#5181DB #DB51C6 #DBAB51 #51DB66

split-complementary

#5181DB #DB6651 #C6DB51

monochromatic

#1E4793 #2960C6 #5181DB #84A6E5 #B6CAF0

Accessibility & contrast

On white

3.81

#5181DB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.51

#5181DB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181DB

5.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181DB	#FFFFFF	#000000	##000000
##5181DB	1.00	3.81	5.51	5.51
#FFFFFF	3.81	1.00	21.00	21.00
#000000	5.51	21.00	1.00	1.00
##000000	5.51	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#588ADF

Deuteranopia (green-blind)

#447DD9

Tritanopia (blue-blind)

#0095A3

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #5181db;
/* rgb */ color: rgb(81, 129, 219);
/* oklch */ color: oklch(61.3% 0.147 261.8);

Tailwind

colors: {
  custom: {
    50: '#8ea5e6',
    500: '#5181db',
    950: '#000000',
  },
}

SCSS

$custom: #5181db;
$custom-light: #8ea5e6;
$custom-dark: #000000;

JSON

{
  "hex": "#5181db",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 219
  },
  "hsl": {
    "h": 219.13,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.61252,
    "c": 0.14656,
    "h": 261.8
  },
  "luminance": 0.22564
}

Semantic roles & 50–950 ramp

primary

#5181DB

secondary

#DFCCA9

accent

#AE3FE9

background

#F9FAFE

surface

#F2F4FC

border

#CCCED5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #5181DB

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →